Version 0.5.0 of Cascading is now available for download. For details on new features and bug fixes, see the CHANGES.txt file. For a quick summary, read on.
By far, the biggest change is support for sorting via the GroupBy operator. By default the ‘groupFields’ fields are sorted, but to sort fields that are not being grouped on, set the ‘sortFields’ argument. This will allow the values of every grouping key to be sorted before being handed to an Aggregator function.